Pillows can be used for either Hot or Cold Therapy-
But I like the flaxseed pillows to be used cold because the flaxseed burns .
Store your pillow in the freezer in a ziplock bag to use as a ice pack.
Pillow measures 9x4 I filled my pillows with a generous amount of flaxseed so your pillow stays cold longer.
Note- All of my pillows have a muslin pillow inside of the them with the flaxseed and lavender in them..